Surgical tool

Abstract

A surgical tool includes a shaft, a treatment portion provided at a distal end of the shaft, and a body provided at a proximal end of the shaft. The body includes a driven portion that moves in direction parallel to the shaft, based on a first driving force from a surgical robot. A wire or rod that is connected through the shaft to the treatment portion. A lever that converts the first driving force to a second driving force, the second driving force being different from the first driving force, and a connection portion that is connected to the lever and to the wire or rod, and that transmits the second driving force to the wire or rod.

What is claimed is: 
     
         1 . A surgical tool comprising:
 a driven portion configured to move in a linear motion direction, based on a driving force;   a power transmission portion configured to transmit the driving force for moving in the linear motion direction to a treatment portion configured to perform a medical treatment;   a conversion portion configured to convert a first amount of movement of the driven portion in the linear motion direction to a second amount of movement different from the first amount of movement and to transmit the second amount of movement to the power transmission portion; and   a body that includes the driven portion and the conversion portion, and that supports the treatment portion.   
     
     
         2 . The surgical tool according to  claim 1 , further comprising a connection portion connected to the power transmission portion and to the conversion portion, the connection portion being configured to transmit the driving force that is transmitted from the conversion portion to the power transmission portion. 
     
     
         3 . The surgical tool according to  claim 2 ,
 wherein the conversion portion has an elongated shape and comprises a first end rotatably connected to the driven portion and a second end rotatably connected to a supporting portion of the body, and   wherein the connection portion is rotatably connected to the conversion portion between the first end and the second end of the conversion portion.   
     
     
         4 . The surgical tool according to  claim 2 ,
 wherein the conversion portion has an elongated shape and comprises a first end rotatably connected to the driven portion and a second end rotatably connected to the connection portion, and   wherein a portion of the conversion portion between the first end and the second end is rotatably connected to a supporting portion of the body.   
     
     
         5 . The surgical tool according to  claim 4 ,
 wherein a first distance from a first position at which the conversion portion is rotatably connected to the driven portion to a second position at which the supporting portion is rotatably connected to the conversion portion is greater than a second distance from the second position to a third position at which the conversion portion is rotatably connected to the connection portion.   
     
     
         6 . The surgical tool according to  claim 4 ,
 wherein a first distance from a first position at which the conversion portion is rotatably connected to the driven portion to a second position at which the supporting portion is rotatably connected to the conversion portion is less than a second distance from the second position to a third position at which the conversion portion is rotatably connected to the connection portion.   
     
     
         7 . The surgical tool according to  claim 3 ,
 wherein a first distance from a first position at which the conversion portion is rotatably connected to the driven portion to a second position at which the conversion portion is rotatably connected to the connection portion is greater than a second distance from the second position to a third position at which the supporting portion is rotatably connected to the conversion portion.   
     
     
         8 . The surgical tool according to  claim 1 , wherein the second amount of movement is less than the first amount of movement. 
     
     
         9 . The surgical tool according to  claim 1 , wherein the second amount of movement is greater than the first amount of movement. 
     
     
         10 . The surgical tool according to  claim 1 , wherein the conversion portion is configured to convert a first magnitude of the driving force received by the driven portion into a second magnitude of the driving force that is greater than the first magnitude of the driving force and to transmit the second magnitude of the driving force to the power transmission portion. 
     
     
         11 . A surgical tool comprising:
 a shaft;   a treatment portion provided at a distal end of the shaft; and   a body provided at a proximal end of the shaft, wherein the body comprises:
 a driven portion that moves in direction parallel to the shaft, based on a first driving force from a surgical robot; 
 a wire or rod that is connected through the shaft to the treatment portion; 
 a lever that converts the first driving force to a second driving force, the second driving force being different from the first driving force; and 
 a connection portion that is connected to the lever and to the wire or rod, and that transmits the second driving force to the wire or rod. 
   
     
     
         12 . The surgical tool of  claim 11 , wherein a first magnitude of the first driving force is less than a second magnitude of the second driving force. 
     
     
         13 . The surgical tool of  claim 12 , wherein the lever converts a first amount of movement of the driven portion to a second amount of movement less than the first amount of movement and transmits the second amount of movement to the connection portion. 
     
     
         14 . The surgical tool of  claim 11 , wherein the lever converts a first amount of movement of the driven portion to a second amount of movement less than the first amount of movement and transmits the second amount of movement to the connection portion. 
     
     
         15 . The surgical tool of  claim 11 , wherein the lever has a first end and a second end opposite to the first end, and
 the first end of the lever is rotatably connected to the driven portion,   the second end of the lever is rotatably connected to the body; and   the lever is rotatably connected to the connection portion at a point between the first end and the second end.   
     
     
         16 . The surgical tool of  claim 15 , wherein a first distance from a first position at which the lever is rotatably connected to the driven portion to a second position at which the lever is rotatably connected to the connection portion is greater than a second distance from the second position to a third position at which the lever is rotatably connected to the body. 
     
     
         17 . The surgical tool of  claim 11 , wherein the lever has a first end and a second end opposite to the first end, and
 the first end of the lever is rotatably connected to the driven portion,   the second end of the lever is rotatably connected to the connection portion; and   the lever is rotatably connected to the body at a point between the first end and the second end.   
     
     
         18 . The surgical tool according to  claim 17 ,
 wherein a first distance from a first position at which the lever is rotatably connected to the driven portion to a second position at which the lever is rotatably connected to the body is greater than a second distance from the second position to a third position at which the lever is rotatably connected to the connection portion.   
     
     
         19 . The surgical tool according to  claim 17 ,
 wherein a first distance from a first position at which the lever is rotatably connected to the driven portion to a second position at which the lever is rotatably connected to the body is less than a second distance from the second position to a third position at which the lever is rotatably connected to the connection portion.   
     
     
         20 . The surgical tool according to  claim 11 , further comprising a joint portion provided between the shaft and the treatment portion.